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Message |
    
Scott Dickson
Advanced Member
Username: corsair23
Post Number: 160
Registered: 11-2006
| | Posted on Friday, November 13, 2009 - 02:13 pm: | 
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I took apart a spare set of V6 Buick Heads the other week, and discovered spacers underneath the Valve Springs. Anyone know if this is the norm, or?????? One Valve had a bit of an edge on it at the top. I had to file this off to get the Valve through the guide easily. Thanks in advance
S. |
Hy Stat
Senior Member
Username: hystat
Post Number: 1555
Registered: 05-2007
| | Posted on Friday, November 13, 2009 - 07:01 pm: |
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I thought every engine had them. Can't seat a spring against cast iron.... it will chew into the casting. |
Scott Dickson
Advanced Member
Username: corsair23
Post Number: 161
Registered: 11-2006
| | Posted on Friday, November 13, 2009 - 08:51 pm: |
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Thanks Hy Stat, I'd never seen this before in any other engine I've ever torn down.I thought it was an attempt to increase the pressure on the spring to make the valve close tighter.The springs in these heads are whipped (out of square).One valve had a burr on the tip I had to file down to get it to come out through the seat. The Valves appear to be strait, according to my Sine Bar. I made it in College. It's ground to a tolerance of + or - 1 10,000th of an inch over 6 inches. |
Hy Stat
Senior Member
Username: hystat
Post Number: 1556
Registered: 05-2007
| | Posted on Friday, November 13, 2009 - 09:32 pm: |
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hmmm. actually, I don't see any reference to spring seats in the parts book for the 155 Buick, but maybe the heads have been rebuilt.
The valve springs are only a few dollars each, so I doubt any shimming would have been done.
Maybe if the valves were recessed into the seats someone tried to shim them...never heard of that, but how do the seats look? |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 4367
Registered: 04-2006
| | Posted on Friday, November 13, 2009 - 09:56 pm: |
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Have seen that from time to time, but never on an ORIGINAL marine engine.
The trick was used to increase spring load on engines with low-lift cam lobes and long durations. The danger is that if someone changes the cam from the 'original' to a marine when converting a car engine to marine without removing the 'shim', the spring bottoms and the result is a 'burr' like mentioned.
Replace with 'original' spring set-up for the cam installed! |
Scott Dickson
Advanced Member
Username: corsair23
Post Number: 162
Registered: 11-2006
| | Posted on Sunday, November 15, 2009 - 03:55 am: |
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<< Replace with 'original' spring set-up for the cam installed!>>
You mean replace new springs withOUT the shims?
These heads are spares, and not whats in the boat. |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 4374
Registered: 04-2006
| | Posted on Sunday, November 15, 2009 - 04:10 am: |
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Are you talking factory new for your MARINE engine or second hand? |
Scott Dickson
Advanced Member
Username: corsair23
Post Number: 163
Registered: 11-2006
| | Posted on Sunday, November 15, 2009 - 08:10 am: |
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I must seem stupid this morning (not much sleep between band gigs the weekend), but I tore these heads down to have them tanked.I mean to replace the springs ONLY when re-assembling, with new springs that are called for by Spec.The block these heads came off of is toast. |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 4376
Registered: 04-2006
| | Posted on Sunday, November 15, 2009 - 08:28 am: |
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Was the engine these heads got of installed between 4 wheels (car), or inside some bath-tub like (boat)glass-fiber design?
If you intend to fit those heads on another engine, use the same spring set up that is on the 'new' engine!
Check however that valve disc and stems have the same diameter, that might vary between 'land' and 'sea'. |
Scott Dickson
Advanced Member
Username: corsair23
Post Number: 165
Registered: 11-2006
| | Posted on Sunday, November 15, 2009 - 07:33 pm: |
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The engine these came off of, was in a Boat.It still was connected to the Int. with front engine mount.It still had boat wood attached. I wanted a block, what I got was the heads, Intake, and all tinwork. The block was rust scored too deep in one cylinder.Forgot to save the Cam. |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 4381
Registered: 04-2006
| | Posted on Sunday, November 15, 2009 - 10:38 pm: |
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What is the year of the 'slaughtered' engine? |
Scott Dickson
Advanced Member
Username: corsair23
Post Number: 166
Registered: 11-2006
| | Posted on Monday, November 16, 2009 - 01:32 am: |
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Unknown. The one head DOES have an OMC tag on it.It's too damaged to read. will try with a magnifying glass. |
Morten Ringvold
Senior Member
Username: haffiman37
Post Number: 4383
Registered: 04-2006
| | Posted on Monday, November 16, 2009 - 02:10 am: |
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Even if I go back to the late 60 - early 70, the springs are noted as 1-piece and no separate washer/spacer at the bottom.
What BRP state in their catalog is that parts are available from Kaiser-Jeep dealers!
Suggest you search for a CJ5 'specialist' in your area. The HP rating seems to be similar in both marine and auto configuration as std, which should indicate same major parts. |
Scott Dickson
Advanced Member
Username: corsair23
Post Number: 169
Registered: 11-2006
| | Posted on Sunday, November 29, 2009 - 08:51 pm: |
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Sorry I havent replied. I've had a bad attack of Rotator Cuff BS.
Here's what the tag showed....
1st number on top...HUPF69MB
2nd number J0111384
Scott |
chiefalen
Advanced Member
Username: chiefalen
Post Number: 406
Registered: 03-2008
| | Posted on Monday, November 30, 2009 - 01:40 am: |
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67-72 same motor. He posted it's a OMC. Thats the year gap on a 155. Kaiser, if i remember correctly.
Now what exactly you want to do with these heads?
You have a 155 in your boat, cause you posted " Spare heads " ? |
Scott Dickson
Advanced Member
Username: corsair23
Post Number: 170
Registered: 11-2006
| | Posted on Monday, November 30, 2009 - 08:57 am: |
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I was just tearing them apart for sh#ts and giggles.
I'm having them tanked, then re=assembling using new springs, As spares. |
chiefalen
Advanced Member
Username: chiefalen
Post Number: 407
Registered: 03-2008
| | Posted on Monday, November 30, 2009 - 09:06 am: |
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Jeez i can't remember what i ate last night but motors and years 40-50 years ago i know.
Scott you have all this time come over here and mess with my sons 1996 Camaro. Picked it up for 600 bucks, runs great has a 3.8 motor 200 hp scary fast.
Sons only 14 figure i'll have it perfect in 3-4 years till he gets the paper that lets him drive. |
